The most prominent fix that iOS 11.0.2 has added is for the static or crackling sound that some of the iPhone 8 and iPhone 8 Plus owners experience through the earpiece while on a FaceTime or a cellular call. The iOS 11.0.2 software update carries a build number of 15A421.

You can download and install iOS 11.0.1 as an Over-The-Air (OTA) update. Which is available under Settings > General > Software Update right from your iOS device. If somehow, the OTA update does not appear on your device, you can download iOS 11.0.2 IPSW file from the download links below.

The official changelog for iOS 11.0.2 released by Apple includes performance improvements and bug fixes for the compatible iOS devices:

Fixes an issue where crackling sounds may occur during calls for a small number of iPhone 8 and 8 Plus devices

Addresses an issue that could cause some photos to become hidden

Fixes an issue where attachments in S/MIME encrypted emails would not open

If you want detailed information regarding security content of iOS 11.0.2, please check out this link.

Apple has also released iOS 11.1 beta, its next major software update for iPhone, iPad, and iPod Touch devices. The first beta is currently available to both the developers and public beta testers. Do not expect Apple to release iOS 11.1 final version anytime soon.

iOS 11.0.2 IPSW Download Links

Here are the direct download links for iOS 11.0.2 IPSW files for compatible iPhone, iPad, and iPod Touch device. You can use these IPSW firmware files and install using iTunes.